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A method for preparing fertilizer-water solution and slow-release tank from excess sludge

A technology of excess sludge and slow-release tanks, applied in the field of slow-release tanks, can solve the problems of being difficult to remove, use, and cannot be used as aquatic fertilizers, and achieve the effects of low cost, good fertilizer and water effects, high environmental benefits and economic benefits

Active Publication Date: 2021-03-16
哈尔滨市丰稔农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The residual sludge of the sewage treatment plant contains a large amount of nitrogen, phosphorus, potassium and rich trace elements, contains various organic matter such as protein, and also contains toxic and harmful substances such as heavy metals. These harmful substances are difficult to get out after simple fermentation treatment, and cannot Use as aquaculture fertilizer

Method used

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  • A method for preparing fertilizer-water solution and slow-release tank from excess sludge
  • A method for preparing fertilizer-water solution and slow-release tank from excess sludge
  • A method for preparing fertilizer-water solution and slow-release tank from excess sludge

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1: the preparation of fertilizer water slow-release tank 1 and fertilizer water liquid 1

[0022] Take 2Kg of fresh excess sludge with a moisture content of 80%, add 200g of superphosphate, 300g of diatomaceous earth and 400g of 30% hydrogen peroxide, mix well, freeze at -18°C for 24 hours, take it out, To obtain the frozen solid sludge material, take another 2L of mixed acid solution containing 1 mol / L and 0.25 mol / L of nitric acid and sulfuric acid respectively, add 10 g of nano-calcium titanate powder, stir and mix, and disperse evenly to make nano-titanic acid Calcium-mixed acid suspension is heated to 90°C, and the mixed acid suspension is sprayed into the frozen solid sludge at a spray speed of 100m / s with a high-pressure spray gun to crush and melt the frozen sludge , stir evenly, heat and keep boiling slightly for 40min, cool to room temperature, and separate solid and liquid to obtain solid A and liquid A; mix solid A with equal mass of water, stir e...

Embodiment 2

[0023] Embodiment 2: the preparation of fertilizer water slow-release tank 2 and fertilizer water liquid 2

[0024] Take 2Kg of fresh excess sludge with a moisture content of 88%, add 100g of superphosphate, 200g of diatomaceous earth and 200g of 30% hydrogen peroxide, mix well, freeze at -8°C for 24h, take it out, To obtain the frozen solid sludge material, take another 2L of mixed acid solution containing 0.5 mol / L and 0.5 mol / L of nitric acid and sulfuric acid respectively, add 2g of nano-calcium titanate powder, stir and mix, and disperse evenly to make nano-titanic acid Calcium-mixed acid suspension is heated to 60°C, and the mixed acid suspension is sprayed into the frozen solid sludge at a spray speed of 82m / s with a high-pressure spray gun to crush and melt the frozen sludge , stir evenly, heat and keep slightly boiling for 60min, cool to room temperature, and separate solid and liquid to obtain solid A and liquid A; mix solid A with equal mass of water, stir evenly, h...

Embodiment 3

[0025] Embodiment 3: the preparation of fertilizer water slow-release tank 3 and fertilizer water liquid 3

[0026]Take 2Kg of fresh excess sludge with a moisture content of 85%, add 200g of superphosphate, 400g of diatomaceous earth and 400g of 30% hydrogen peroxide, mix well, freeze at -20°C for 24 hours, take out , to obtain frozen solid sludge material, and another 2L of mixed acid solution containing nitric acid and sulfuric acid with 1 mol / L and 0.5 mol / L respectively, was added to 20g of nano-calcium titanate powder, stirred and mixed, dispersed evenly, and made into nano-titanium Calcium acid-mixed acid suspension, heated to 90°C, using a high-pressure spray gun, spray the mixed acid suspension into the frozen solid sludge at a spray speed of 100m / s to crush the frozen sludge Melt, stir evenly, heat and keep boiling slightly for 30min, cool to room temperature, and separate solid and liquid to obtain solid A and liquid A; mix solid A with water of equal mass, stir even...

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Abstract

The invention discloses a method for preparing slow-release tank and fertilizer water liquid by utilizing residual sludge. Various additives are added into the sludge in proportion, the sludge is smashed by high-pressure acid jet flow with a catalyst after freezing, solid-liquid separation is carried out, amino acid, nitrogen, phosphorus, potassium and a great quantity of trace elements in the sludge are extracted out, a pH value is regulated, excessive metal is deposited in a form of hydroxide, and liquid is used as the fertilizer water liquid for aquaculture after being processed; ingredients, such as solid precipitates, residues and the like, are dried, ball-milled, subjected to pressure forming, dried and calcined to obtain the porous ceramic slow-release tank. According to the method, each ingredient in the sludge is utilized; no secondary pollution is generated; the prepared fertilizer water liquid is added into the fertilizer water slow-release tank, and the fertilizer water liquid is slowly and continuously released into water through micropores on the tank wall, so that fertilizer efficiency is effectively utilized, and microorganism growth is uniform and continuous. Quality of aquatic products is improved, water quality is purified, and cost is low. The method has very high environmental benefits and economic benefits.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for preparing fertilizer-water liquid and a slow-release tank with the function of purifying water quality by using excess sludge. Background technique [0002] Due to factors such as environmental pollution and overfishing, the output of natural aquatic resources such as oceans, rivers and lakes has shrunk year by year. In order to meet the increasing demand for aquatic products, the aquaculture industry has developed rapidly. Whether it is freshwater aquaculture or marine aquaculture, the water quality of aquaculture water directly affects the yield, quality and safety of aquatic products. Fertilization of water and aquatic products is an indispensable part of aquaculture. Fertilization of water bodies can increase the plankton in the water body, improve the oxygenation capacity of the water body itself, eliminate harmful substances such as ammonia nitrogen and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/00C04B35/622C05G1/00
CPCC04B35/00C04B35/62204C04B2235/3201C04B2235/3208C04B2235/3236C04B2235/3427C04B2235/442C04B2235/447C04B2235/6562C04B2235/6567C05B1/02C05G5/20C05D1/00C05D3/00C05D9/00C05F7/00
Inventor 张东许振钰李安邦
Owner 哈尔滨市丰稔农业科技有限公司
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